1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <dlfcn.h>
18
19#include <cutils/log.h>
20
21#include "jni.h"
22#include "DdmConnection.h"
23
24namespace android {
25
26void DdmConnection_start(const char* name) {
27    ALOGI("DdmConnection_start");
28    DdmConnection::start(name);
29}
30
31void DdmConnection::start(const char* name) {
32    JavaVM* vm;
33    JNIEnv* env;
34
35    // start a VM
36    JavaVMInitArgs args;
37    JavaVMOption opt;
38
39    opt.optionString =
40        "-agentlib:jdwp=transport=dt_android_adb,suspend=n,server=y";
41
42    args.version = JNI_VERSION_1_4;
43    args.options = &opt;
44    args.nOptions = 1;
45    args.ignoreUnrecognized = JNI_FALSE;
46
47
48    void* libdvm_dso = dlopen("libdvm.so", RTLD_NOW);
49    ALOGE_IF(!libdvm_dso, "DdmConnection: %s", dlerror());
50
51    void* libandroid_runtime_dso = dlopen("libandroid_runtime.so", RTLD_NOW);
52    ALOGE_IF(!libandroid_runtime_dso, "DdmConnection: %s", dlerror());
53
54    if (!libdvm_dso || !libandroid_runtime_dso) {
55        goto error;
56    }
57
58    jint (*JNI_CreateJavaVM)(JavaVM** p_vm, JNIEnv** p_env, void* vm_args);
59    JNI_CreateJavaVM = (typeof JNI_CreateJavaVM)dlsym(libdvm_dso, "JNI_CreateJavaVM");
60    ALOGE_IF(!JNI_CreateJavaVM, "DdmConnection: %s", dlerror());
61
62    jint (*registerNatives)(JNIEnv* env, jclass clazz);
63    registerNatives = (typeof registerNatives)dlsym(libandroid_runtime_dso,
64        "Java_com_android_internal_util_WithFramework_registerNatives");
65    ALOGE_IF(!registerNatives, "DdmConnection: %s", dlerror());
66
67    if (!JNI_CreateJavaVM || !registerNatives) {
68        goto error;
69    }
70
71    if (JNI_CreateJavaVM(&vm, &env, &args) == 0) {
72        jclass startClass;
73        jmethodID startMeth;
74
75        // register native code
76        if (registerNatives(env, 0) == 0) {
77            // set our name by calling DdmHandleAppName.setAppName()
78            startClass = env->FindClass("android/ddm/DdmHandleAppName");
79            if (startClass) {
80                startMeth = env->GetStaticMethodID(startClass,
81                        "setAppName", "(Ljava/lang/String;I)V");
82                if (startMeth) {
83                    jstring str = env->NewStringUTF(name);
84                    env->CallStaticVoidMethod(startClass, startMeth, str, getuid());
85                    env->DeleteLocalRef(str);
86                }
87            }
88
89            // initialize DDMS communication by calling
90            // DdmRegister.registerHandlers()
91            startClass = env->FindClass("android/ddm/DdmRegister");
92            if (startClass) {
93                startMeth = env->GetStaticMethodID(startClass,
94                        "registerHandlers", "()V");
95                if (startMeth) {
96                    env->CallStaticVoidMethod(startClass, startMeth);
97                }
98            }
99        }
100    }
101    return;
102
103error:
104    if (libandroid_runtime_dso) {
105        dlclose(libandroid_runtime_dso);
106    }
107    if (libdvm_dso) {
108        dlclose(libdvm_dso);
109    }
110}
111
112}; // namespace android
113